Set-top box



FIG. 1 is a top, front, right side perspective view of a set-top box showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a front side view thereof; and,

FIG. 7 is a back side view thereof.

The broken lines are for illustrative purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for a set-top box, as shown and described. 